DBMS_RANDOM
Could anyone please let me know how to use the dbms_random package?
I used DBMS_RANDOM in my procedure but I noticed that the random repeated a number. I think this is strange. I ran the code again and it worked well. Is it possible that the DBMS_RANDOM procedure may repeat a number. Below is the output screen and my code.
SQL> BEGIN
2 RANDOM_SAMPLING;
3 COMMIT;
4 END;
5 /
The Range numbers: 1350467 : 1350485
This is the range to insert: 1350480
This is the range to insert: 1350484
This is the range to insert: 1350484
PL/SQL procedure successfully completed.
M_num := 1350485 - 1350467+ 1;
WHILE COUNTER < MARK_20_PERCENT
LOOP
RANDNUM := mod(abs(dbms_random.random), M_NUM )+1350467;
DBMS_OUTPUT.PUT_LINE(' About to insert. This is the range to insert: '||RANDNUM);
INSERT INTO T
SELECT *
FROM b
WHERE T_KEY = RANDNUM;
COUNTER := COUNTER + 1;
END LOOP;
Edited by: user8738152 on May 27, 2011 12:10 PM
Similar Messages
-
Error while inserting data using DBMS_RANDOM
Hi ,
I tried the following insert command in the link http://www.oracle-base.com/articles/misc/RollupCubeGroupingFunctionsAndGroupingSets.php
BANNER
Oracle Database 10g Release 10.2.0.1.0 - Production
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> INSERT INTO dimension_tab
2 SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
3 TRUNC(DBMS_RANDOM.value(low => 1, high => 6)) AS fact_2_id,
4 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_3_id,
5 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_4_id,
6 ROUND(DBMS_RANDOM.value(low => 1, high => 100), 2) AS sales_value
7 FROM dual
8 CONNECT BY level <= 1000;
SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
ERROR at line 2:
ORA-00907: missing right parenthesisCould you please advice me to get the correct recordssmile wrote:
Hi ,
I tried the following insert command in the link http://www.oracle-base.com/articles/misc/RollupCubeGroupingFunctionsAndGroupingSets.php
BANNER
Oracle Database 10g Release 10.2.0.1.0 - Production
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> INSERT INTO dimension_tab
2 SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
3 TRUNC(DBMS_RANDOM.value(low => 1, high => 6)) AS fact_2_id,
4 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_3_id,
5 TRUNC(DBMS_RANDOM.value(low => 1, high => 11)) AS fact_4_id,
6 ROUND(DBMS_RANDOM.value(low => 1, high => 100), 2) AS sales_value
7 FROM dual
8 CONNECT BY level <= 1000;
SELECT TRUNC(DBMS_RANDOM.value(low => 1, high => 3)) AS fact_1_id,
ERROR at line 2:
ORA-00907: missing right parenthesisCould you please advice me to get the correct recordsYou can't used named parameters for function/procedure calls in SQL until version 11.
You'll have to remove the
low => And stick with the good old "positional" way of doing things. -
Error from dbms_random package
I have tried unsuccessfully to get the dbms_random package installed. This is my latest error message. Can anyone help me out?
call dbms_random.initialize(12345)
ERROR at line 1:
ORA-04068: existing state of packages has been discarded
ORA-04063: package body "SYS.DBMS_CRYPTO_TOOLKIT" has errors
ORA-06508: PL/SQL: could not find program unit being called
ORA-06512: at "SYS.DBMS_RANDOM", line 19
ORA-06512: at line 1
nullIf you are running Oracle8 Release 8.0.3, DBMS_RANDOM may not have been installed in your database. In this case, you need to execute the following scripts in the specified order from within your SYS account: dbmsoctk.sql, prvtoctk.plb, and finally dbmsrand.sql (it contains both the package specification and body for DBMS_RANDOM).
Good Luck -
hallo,
i would like to know how DBMS_RANDOM package can be implemented.
can you please explain with example.
is there any other means of performimg random sampling?
thank you
regards,
raoHi
Desc DBMS_RANDOM;
PROCEDURE INITIALIZE
Názov argumentu Typ In/Out predvolene?
VAL BINARY_INTEGER IN
FUNCTION NORMAL RETURNS NUMBER
FUNCTION RANDOM RETURNS BINARY_INTEGER
PROCEDURE SEED
Názov argumentu Typ In/Out predvolene?
VAL BINARY_INTEGER IN
PROCEDURE SEED
Názov argumentu Typ In/Out predvolene?
VAL VARCHAR2 IN
FUNCTION STRING RETURNS VARCHAR2
Názov argumentu Typ In/Out predvolene?
OPT CHAR IN
LEN NUMBER IN
PROCEDURE TERMINATE
FUNCTION VALUE RETURNS NUMBER
FUNCTION VALUE RETURNS NUMBER
Názov argumentu Typ In/Out predvolene?
LOW NUMBER IN
HIGH NUMBER IN
Example in SQL+:
Exec DBMS_RANDOM.INITIALIZE(100);
SELECT DBMS_RANDOM.Normal
, DBMS_RANDOM.RANDOM
, DBMS_RANDOM.VALUE()
, DBMS_RANDOM.VALUE(10,100)
FROM DUAL;
milos -
DBMS_RANDOM and ORA-01436: CONNECT BY loop in user data
Hi,
The following query gets the error "ORA_01436: CONNECT BY loop in user data":
SELECT currentdate
, ADD_MONTHS ( currentdate
, (LEVEL - 1) * months
) + ((LEVEL - 1) * days) AS final_date
, level
FROM table_z
WHERE CONNECT_BY_ISLEAF = 1
CONNECT BY currentdate = PRIOR currentdate
AND PRIOR dbms_random.value IS NOT NULL
AND ADD_MONTHS ( currentdate
, (LEVEL - 2) * months
) + ((LEVEL - 2) * days) <= TO_DATE ( '05/01/2008'
, 'MM/DD/YYYY'
);I've seen "PRIOR dbms_random.value IS NOT NULL" used like this as as a way to get around ORA-01436 in Oracle 9, but I'm using Oracle 11, and it doesn't work
currentdate is unique.
If I hard-code any one set of values, like this:
DEFINE currentdate = "TO_DATE ('03/02/2006', 'MM/DD/YYYY')"
DEFINE days = 300
DEFINE months = 0
SELECT ¤tdate
, ADD_MONTHS ( ¤tdate
, (LEVEL - 1) * &months
) + ((LEVEL - 1) * &days) AS final_date
FROM dual
WHERE CONNECT_BY_ISLEAF = 1
CONNECT BY ¤tdate = PRIOR ¤tdate
AND PRIOR dbms_random.value IS NOT NULL
AND ADD_MONTHS ( ¤tdate
, (LEVEL - 2) * &months
) + ((LEVEL - 2) * &days) <= TO_DATE ( '05/01/2008'
, 'MM/DD/YYYY'
);I can get the correct results from dual. I was looking for a way to extend this to get multiple rows from table_z in the same query.
The problem came up in [this thread|http://forums.oracle.com/forums/thread.jspa?threadID=894946&tstart=0], where the problem is:
Given this table:
CREATE TABLE table_z
( currentdate DATE
, months NUMBER
, days NUMBER
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('03/02/2006', 'MM/DD/YYYY'), 0, 300);
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('04/05/2006', 'MM/DD/YYYY'), 10, 0);
INSERT INTO table_z (currentdate, months, days) VALUES (TO_DATE ('05/04/2006', 'MM/DD/YYYY'), 3, 0);I'm trying to add the given number of months and/or days to currentdate until I reach a given hard-coded cutoff date (05/01/2008 in this case).
That is, the desired results from the data above are:
CURRENTDAT MONTHS DAYS FINALDATE
03/02/2006 0 300 08/18/2008
04/05/2006 10 0 10/05/2008
05/04/2006 3 0 05/04/2008Edited by: Frank Kulash on May 4, 2009 7:38 PM
Typo in CONNECT BY conditions fixed.Hi Frank,
Sounds like a bug. Funny enough, but this works:
SQL> select * from v$version where rownum = 1
2 /
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
SQL> SELECT currentdate
2 , ADD_MONTHS ( currentdate
3 , (LEVEL - 1) * months
4 ) + ((LEVEL - 1) * days) AS final_date
5 , level
6 FROM table_z
7 WHERE CONNECT_BY_ISLEAF = 1
8 CONNECT BY currentdate = PRIOR currentdate
9 AND PRIOR dbms_random.value IS NOT NULL
10 AND ADD_MONTHS ( currentdate
11 , (LEVEL - 1) * months
12 ) + ((LEVEL - 1) * days) <= TO_DATE ( '05/01/2008'
13 , 'MM/DD/YYYY'
14 );
FROM table_z
ERROR at line 6:
ORA-01436: CONNECT BY loop in user data
SQL>
SQL> ed
Wrote file afiedt.buf
1 SELECT currentdate
2 , ADD_MONTHS ( currentdate
3 , (LEVEL - 1) * months
4 ) + ((LEVEL - 1) * days) AS final_date
5 , level
6 FROM table_z
7 WHERE CONNECT_BY_ISLEAF = 1
8 CONNECT BY currentdate = PRIOR currentdate + 0
9 AND PRIOR dbms_random.value IS NOT NULL
10 AND ADD_MONTHS ( currentdate
11 , (LEVEL - 1) * months
12 ) + ((LEVEL - 1) * days) <= TO_DATE ( '05/01/2008'
13 , 'MM/DD/YYYY'
14* )
SQL> /
CURRENTDA FINAL_DAT LEVEL
02-MAR-06 23-OCT-07 3
05-APR-06 05-DEC-07 3
04-MAY-06 04-FEB-08 8
SQL> SY. -
How to use dbms_random in TimesTen
Hi, All,
dbms_random is the supplied procedure in TimesTen 11.2.1,
but I failed with the following select statement:
select dbms_random.value from dual; or select sys.dbms_random.value from dual
the error I got is "1024: Referenced table DBMS_RANDOM not in FROM list"
But all of the query is OK for OracleDB.
How can I use dbms_random in TimesTen?
Thanks
Edited by: user536764 on 2011-1-5 上午8:24In pl/sql work fine
declare
v number;
begin
v := dbms_random.value(1,100);
dbms_output.put_line(v);
end;
85.95011054036622138729731389231348690891 -
I would like to return a number between 0-9999 through the dbms_random function. I am trying this:
exec dbms_random.initialize(1234);
select dbms_random.random from dual;
RANDOM
-3.10E+08
this is not what I am looking for. Anyone know how I can get the desired results I am looking for?SQL> SELECT DBMS_RANDOM.Value(0,9999) FROM dual;
DBMS_RANDOM.VALUE(0,9999)
2499.13527
SQL> /
DBMS_RANDOM.VALUE(0,9999)
6274.76354TTFN
John -
DBMS_RANDOM inconsistent behaviour ?
Hi:
I have an issue with DBMS_RANDOM on 9.2.0.6
#### TEST CASE #####
create table t1 (col1 number);
insert into t1 values ('1');
insert into t1 values ('2');
insert into t1 values ('3');
-- ## QUERY1
select rnd1, rnd1, col1 from (select * from (select dbms_random.string('U',5)
rnd1,col1 from t1));
RND1 RND1 COL1
<font color="#cc0000">EVJMP CZGSY</font> 1 <- the two occurrences of RND are different
WHZTP TEJBP 2
HOMYO DQVKG 3
-- ## QUERY2
select rnd1, rnd1, col1 from (select * from (select dbms_random.string('U',5)
rnd1,col1 from t1 where rownum < 99));
RND1 RND1 COL1
<font color="#0000cc">DGMSG DGMSG</font> 1 <- the two occurrences of RND are equal
MUEFU MUEFU 2
UAKLH UAKLH 3
##########<br>
I believe that query1 behaves wrong, I cannot reference the random value... while I believe query2 is correct.<br>
My goal is to have multiple occurrences of rnd1 field share the same value, without applying filtering with rownum.<br>
Is this the intended behaviour?<br>
Any idea on how to make query1 behave as query2?Very odd this is what you select returns on 9.2.0.6
SQL> select * from (select * from (select dbms_random.string('U',5)
2 rnd1,dbms_random.string('U',5)rnd2, col1 from t1 where rownum < 99))
3 /
RND1 RND2 COL1
AOPLL DHRHE 1
XPACR ADOUK 2
YIKOZ SERFB 3
And when I use
SQL> select rnd1, rnd1, col1
2 from (select rownum as Rnum,dbms_random.string('U',5) rnd1, col1 from t1)
3 /
RND1 RND1 COL1
CGXNN CGXNN 1
IYWMM IYWMM 2
GDTCT GDTCT 3
GJPLM GJPLM 4
JHXCO JHXCO 5
null -
What number distribution does the random number generator in the dbms_random package produce?
Michael Peddemors (guest) wrote:
: Is the DBMS_RANDOM package included in the 8.0.5 distribution?
: My calls to it are the typical..
: PLS-00201: identifier 'DBMS_RANDOM.INITIALIZE' must be declared
Okay, Thanks, found that $ORACLE_HOME/rdbms/admin/dbmsrand.sql
and ran it but.. it required the dbms_crypto_toolkit
So, I found dbmsoctk.sql but it has no function body
ORA-04068: existing state of packages has been discarded
ORA-04067: not executed, package body "SYS.DBMS_CRYPTO_TOOLKIT"
does not exist
ORA-06508: PL/SQL: could not find program unit being called
ORA-06512: at "SYS.DBMS_RANDOM", line 19
ORA-06512: at line 7
Did a grep of all the .sql files and found few bodies, EXCEPT in
the dbmsrand.sql...
But it requires this.. anyone??
null -
hi,
i want to see all the options available in DBMS_RANDOM package.
like the same how can i see from DBMS_LOB,AND other dbms packages.
is there any dictionary is available.
please advice.
thanks
sivasankar.sEverything you wanted to know about DBMS_XXXX packages...
http://download-east.oracle.com/docs/cd/B19306_01/appdev.102/b14258/toc.htm
.... excerpt below....
DBMS_RANDOM
Using DBMS_RANDOM
Security Model
Operational Notes
Summary of DBMS_RANDOM Subprograms
INITIALIZE Procedure
NORMAL Function
RANDOM Procedure
SEED Procedures
STRING Function
TERMINATE Procedure
VALUE Functions Message was edited by:
Mark Reichman -
SELECT value
into xxxx
FROM
( SELECT value FROM a
ORDER BY dbms_random.value )
WHERE rownum = 1;
When it picks value 123, how can code it to not pick value123 at least for a year?Hi,
When it picks value 123, how can code it to not pick value123 at least for a year?You're asking for a random value, and yet you want it to be (albeit temporarily) unique ?
bells ringin'
That's an oxymoron ;-)
See:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:831827028200 -
I use The ORACLE version is 8.05 and the OS is win2000 server.
I want to know execute DBMS_RANDOM, it must be installed what
associated packages? And before this i run the script
dbmsoctk.sql and dbmsrand.sql and grant execute privilege to the
user, Why when I Execute the procedure randomdata the ORACLE
tell me the package body "SYS.DBMS_CRYPTO_TOOLKIT" not exist?
Urgent! Pls help me!If you can find later versions of dbmsrand.sql, they don't
require that package. Or you could use
http://burtleburtle.net/bob/other/rnd.sql
which is similar to the later versions. -
Hi,
I got one suituation to calculate the percentage and based on that i have to do an insertion into tableA and tableB.
4 types of roles are there role1, role2, role3, role4 .
role1 80%
role2 70%
role3 30%
role4 10%
I have to generate random number, if the role -> role1 random number is 55 and its entered into tableA . next time role2 user is entered
and the random number is 20 and its entered into TableB.... But now my question is i have to use 4 random numbers .
is it possible to use in oracle procedure. i should not use any temp tables ... is there any other solutions are there ?
Regards,
KBGHaven't you read my last piece of code?
declare
rand_num_1 number := trunc(dbms_random.value(0,100));
rand_num_2 number := trunc(dbms_random.value(0,100));
rand_num_3 number := trunc(dbms_random.value(0,100));
rand_num_4 number := trunc(dbms_random.value(0,100));
begin
-- do what you want with the 4 random numbers...
end;
SQL> declare
2 rand_num_1 number := trunc(dbms_random.value(0,100));
3 rand_num_2 number := trunc(dbms_random.value(0,100));
4 rand_num_3 number := trunc(dbms_random.value(0,100));
5 rand_num_4 number := trunc(dbms_random.value(0,100));
6 begin
7 dbms_output.put_line('Rand1 ='||rand_num_1);
8 dbms_output.put_line('Rand2 ='||rand_num_2);
9 dbms_output.put_line('Rand3 ='||rand_num_3);
10 dbms_output.put_line('Rand4 ='||rand_num_4);
11 end;
12 /
Rand1 =2
Rand2 =55
Rand3 =58
Rand4 =99Max
[My Italian Oracle blog|http://oracleitalia.wordpress.com/2010/01/10/crittografia-in-plsql-utilizzando-dbms_crypto/]
Edited by: Massimo Ruocchio on Jan 12, 2010 12:40 PM
Added example -
How to generate DBMS_RANDOM Timestamp using procedure
Hi,
I got a copy from askTom site for the store procedure of creating random numbers in a table:
create or replace procedure clone( p_tname in
varchar2, p_records in number )
authid current_user
as
l_insert long;
l_rows number default 0;
begin
execute immediate 'create table clone_' || p_tname ||
' as select * from ' || p_tname ||
' where 1=0';
l_insert := 'insert into clone_' || p_tname ||
' select ';
for x in ( select data_type, data_length,
rpad( '9',data_precision,'9')/power(10,data_scale) maxval
from user_tab_columns
where table_name = 'CLONE_' || upper(p_tname)
order by column_id )
loop
if ( x.data_type in ('NUMBER', 'FLOAT' ))
then
l_insert := l_insert || 'dbms_random.value(1,' || x.maxval ||
elsif ( x.data_type = 'DATE' )
then
l_insert := l_insert ||
'sysdate+dbms_random.value+dbms_random.value(1,1000),';
else
l_insert := l_insert || 'dbms_random.string(''A'',' ||
x.data_length || '),';
end if;
end loop;
l_insert := rtrim(l_insert,',') ||
' from all_objects where rownum <= :n';
loop
execute immediate l_insert using p_records - l_rows;
l_rows := l_rows + sql%rowcount;
exit when ( l_rows >= p_records );
end loop;
end;
Can somebody tell me how to generate a random TIMESTAMP?
I try to change "sysdate" to systimestamp" and it give me an error:
ERROR at line 1:
ORA-01841: (full) year must be between -4713 and +9999, and not be 0
Please help!!
Message was edited by:
eecow
Message was edited by:
eecow
nullCan you give me an example of doing this?
The other question is:
Can the store procedure code (above) check other things other than data type?
For example:
if attributeName = 'percentage' --> create a random number from 0 to 100
The reason is because I am trying to generate some more "realistic" data. Some fields can be unrelistic, but fields like "percentage" should be within 0-100 and should not have something like 200 :)
Please advise.
Thanks! -
Change format date TO_DATE(TRUNC(DBMS_RANDOM.VALUE...
Hi all...
I am trying dbms_random like this :
**Type data :
AAAA VARCHAR2(35)
BBBB VARCHAR2(6)
DDDD VARCHAR2(20)
E_DATE VARCHAR2(14)
**store procedur :
BEGIN
FOR X IN 0..3 LOOP
INSERT INTO TEST VALUES (
'AAAA--'|| dbms_random.string('X', 28),
'BBBB' || TO_CHAR (TRUNC(dbms_random.value(0,10))),
'CCCC--'|| dbms_random.string('X', 12),
TO_DATE(TRUNC(DBMS_RANDOM.VALUE(2455532,2455563+3)),'J')
END LOOP;
END;
Output :
AAAA BBBB DDDD E_DATE
AAAA--RTL2OWN8RVOMY1IUD93RP91RWOQA BBBB1 CCCC--JCWAXRO3TMP0 12-DEC-10
AAAA--629F3A4AIW5E4OHCDVFZ41SFB2U4 BBBB5 CCCC--DLAUZO511Y97 12-DEC-10
AAAA--XHKR95JISQRTRH54KNOQKDVUJ6QF BBBB6 CCCC--K7CHOT2KULNV 10-DEC-10
AAAA--7DRZ38SPRIN26HNA7VPQV9FKWCCQ BBBB7 CCCC--FXV3CCY3BWHY 09-DEC-10i want format E_DATE to DD-MM-YYYY without change type data and still use dbms_random...
Could you pls solve me out ?
Thank you
-newbie-pl/sql-Hi,
Sorry, I'm not sure I uderstand the problem.
Are you getting the date correctly, but you want to store it in a VARCHAR2 column? That's not a very good idea: dates belong in DATE columns, but if you ever want to convert a DATE into a string, use TO_CHAR:
TO_CHAR ( TO_DATE ( TRUNC ( DBMS_RANDOM.VALUE (2455532, 2455563+3)
, 'J'
, 'DD-MM-YYYY'
)or equivalently:
TO_CHAR ( DATE '2010-12-01' + dbms_random.value (0, 34)
, 'DD-MM-YYYY'
)Since you're not displaying the hours, minutes or seconds, there's no point in using TRUNC just to set them to 00:00:00.
Edited by: Frank Kulash on Feb 9, 2011 10:32 PM
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